/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright IBM Corp. 2008
*
* Authors: Hollis Blanchard <[email protected]>
*/

#ifndef __ASM_44X_H__
#define __ASM_44X_H__

#include <linux/kvm_host.h>

#define PPC44x_TLB_SIZE 64

/* If the guest is expecting it, this can be as large as we like; we'd just
* need to find some way of advertising it. */
#define KVM44x_GUEST_TLB_SIZE 64

struct kvmppc_44x_tlbe {
u32 tid; /* Only the low 8 bits are used. */
u32 word0;
u32 word1;
u32 word2;
};

struct kvmppc_44x_shadow_ref {
struct page *page;
u16 gtlb_index;
u8 writeable;
u8 tid;
};

struct kvmppc_vcpu_44x {
/* Unmodified copy of the guest's TLB. */
struct kvmppc_44x_tlbe guest_tlb[KVM44x_GUEST_TLB_SIZE];

/* References to guest pages in the hardware TLB. */
struct kvmppc_44x_shadow_ref shadow_refs[PPC44x_TLB_SIZE];

/* State of the shadow TLB at guest context switch time. */
struct kvmppc_44x_tlbe shadow_tlb[PPC44x_TLB_SIZE];
u8 shadow_tlb_mod[PPC44x_TLB_SIZE];

struct kvm_vcpu vcpu;
};

static inline struct kvmppc_vcpu_44x *to_44x(struct kvm_vcpu *vcpu)
{
return container_of(vcpu, struct kvmppc_vcpu_44x, vcpu);
}

void kvmppc_44x_tlb_put(struct kvm_vcpu *vcpu);
void kvmppc_44x_tlb_load(struct kvm_vcpu *vcpu);

#endif /* __ASM_44X_H__ */